Title:
LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/202661
Kind Code:
A1
Abstract:
A lithium ion secondary battery which is provided with: a positive electrode that contains, as a positive electrode active material, an active material into which lithium ions are intercalated and deintercalated at a potential of 4.5 V or more with respect to the lithium potential; a negative electrode that contains, as a negative electrode active material, an active material into which lithium ions are intercalated and deintercalated at a potential of 0.4 V or more with respect to the lithium potential; a separator that is interposed between the positive electrode and the negative electrode; and an electrolyte solution that contains a lithium salt and a nonaqueous solvent. This lithium ion secondary battery is configured such that: the nonaqueous solvent contains at least one compound that is selected from the group consisting of phosphoric acid esters which contain fluorine atoms, ethers which contain fluorine atoms and carboxylic acid esters which contain fluorine atoms; and the content of the compound is more than 5% by volume with respect to the total amount of the nonaqueous solvent.
Inventors:
GOGYO YUMA (JP)
HIRASAWA MANABU (JP)
HIRASAWA MANABU (JP)
Application Number:
PCT/JP2019/049919
Publication Date:
October 08, 2020
Filing Date:
December 19, 2019
Export Citation:
Assignee:
HITACHI CHEMICAL CO LTD (JP)
International Classes:
H01M10/052; H01M2/18; H01M10/0567; H01M10/0568; H01M10/0569
Domestic Patent References:
| WO2013129428A1 | 2013-09-06 | |||
| WO2017145497A1 | 2017-08-31 | |||
| WO2016171276A1 | 2016-10-27 | |||
| WO2018123526A1 | 2018-07-05 |
Foreign References:
| JP2014209436A | 2014-11-06 | |||
| JP2014525667A | 2014-09-29 | |||
| JP2018063916A | 2018-04-19 |
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
Download PDF: